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Sidana [21]
3 years ago
9

Please help with b if you understand

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0
I believe if I'm correct the answer is 2a  3b   4c
                                      
                                                         0      ?      f

Sorry I couldn't figure out the one with the question mark.
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A professor using an open source introductory statistics book predicts that 10% of the students will purchase a hard copy of the
Likurg_2 [28]

Answer: The professor was not accurate with his hypothesis.

Null hypothesis: P1 = 12.5%, P2 = 42.5%, P3 = 45%

The alternate hypothesis: At least one proportion of the student will differ from the others.

Step-by-step explanation: To check if the professors hypothesis were inaccurate.

What percentage of student bought a hard copy of the book.

(25 ÷ 200) × 100 = 12.5%

What percentage of the student printed it from the web.

(85 ÷ 200) × 100 = 42.5%

What percentage of the students read it online.

(90 ÷ 200) × 100 = 45%

This means that the professor was not accurate with his hypothesis. Because the proportion of student in his hypothesis was not the same in the actual.

Therefore; the null hypothesis are

P1 = 12.5%, P2 = 42.5%, P3 = 45%

The alternative hypothesis will state that at least one of the proportion will be different from the others.

5 0
3 years ago
in 2015, the population of a town was 8914. The population is expected to grow at a rate of 1.36% each year. At this rate, what
Irina18 [472]
It is 12495 for sure i took the test and got it right

3 0
3 years ago
Read 2 more answers
A zoo train ride costs $3 per adult and $1 per child. On a certain day, the total number of adults (a) and children (c) who took
bearhunter [10]
a+c=30
3a+c=50
c=30-a
3a+30-a=50
2a=20
a=10
a+c=30
10+c=30
c=20

10 Adults and 20 Children 
8 0
3 years ago
What is 11 1/20 as a decimal?
Softa [21]

11,05

Step-by-step explanation:

11 1/20

= (11 × 20 + 1)/20

= (220 + 1)/20

= 221/20 → times 5

= 1105/100

= 11,05

5 0
2 years ago
Read 2 more answers
The domain (input values) of the sine function is:
Nikolay [14]
The input of each of these functions is always an angle, and as you learned in the previous sections, these angles can take on any real number value. Therefore the sine and cosine function have the same domain, the set of all real numbers, \begin{align*}R\end{align*}
3 0
3 years ago
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